<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-bind指令</title>
    <style>
        .active{
            border: 1px solid red;
        }
    </style>
</head>
<body>
    <div id="app">
        <img v-bind:src="imgSrc" alt="">
        <br>
        <img :src="imgSrc" alt="" :title="imgTitle+'!!!'"
        :class="isActive?'active':''" @click="toggleActive">
        <br>
        <img :src="imgSrc" alt="" :title="imgTitle+'!!!'" :class="
        {active:isActive}"@click="toggleActive">
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
    var app=new Vue({
        el:"#app",
        data:{
            imgSrc:"http://www.itheima.com/images/logo.png",
            imgTitle:"黑马程序员",
            isActive:false
        },         
        methods:{
            toggleActive:function(){
                this.isActive=!this.isActive;
            }
        },
    })
        
    
</script>
</body>
</html>